| /* |
| * Copyright (C) 1999 Lars Knoll (knoll@kde.org) |
| * (C) 1999 Antti Koivisto (koivisto@kde.org) |
| * Copyright (C) 2003, 2008, 2010 Apple Inc. All rights reserved. |
| * Copyright (C) 2011 Google Inc. All rights reserved. |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Library General Public |
| * License as published by the Free Software Foundation; either |
| * version 2 of the License, or (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Library General Public License for more details. |
| * |
| * You should have received a copy of the GNU Library General Public License |
| * along with this library; see the file COPYING.LIB. If not, write to |
| * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
| * Boston, MA 02110-1301, USA. |
| * |
| */ |
| |
| #ifndef HTMLLinkElement_h |
| #define HTMLLinkElement_h |
| |
| #include "core/css/CSSStyleSheet.h" |
| #include "core/dom/DOMSettableTokenList.h" |
| #include "core/dom/IconURL.h" |
| #include "core/fetch/ResourcePtr.h" |
| #include "core/fetch/StyleSheetResourceClient.h" |
| #include "core/html/HTMLElement.h" |
| #include "core/html/LinkRelAttribute.h" |
| #include "core/html/LinkResource.h" |
| #include "core/loader/LinkLoader.h" |
| #include "core/loader/LinkLoaderClient.h" |
| |
| namespace WebCore { |
| |
| class DocumentFragment; |
| class HTMLLinkElement; |
| class KURL; |
| class LinkImport; |
| |
| template<typename T> class EventSender; |
| typedef EventSender<HTMLLinkElement> LinkEventSender; |
| |
| // |
| // LinkStyle handles dynaically change-able link resources, which is |
| // typically @rel="stylesheet". |
| // |
| // It could be @rel="shortcut icon" or soething else though. Each of |
| // types might better be handled by a separate class, but dynamically |
| // changing @rel makes it harder to move such a design so we are |
| // sticking current way so far. |
| // |
| class LinkStyle FINAL : public LinkResource, StyleSheetResourceClient { |
| WTF_MAKE_FAST_ALLOCATED; |
| public: |
| static PassRefPtr<LinkStyle> create(HTMLLinkElement* owner); |
| |
| explicit LinkStyle(HTMLLinkElement* owner); |
| virtual ~LinkStyle(); |
| |
| virtual Type type() const OVERRIDE { return Style; } |
| virtual void process() OVERRIDE; |
| virtual void ownerRemoved() OVERRIDE; |
| virtual bool hasLoaded() const OVERRIDE { return m_loadedSheet; } |
| |
| void startLoadingDynamicSheet(); |
| void notifyLoadedSheetAndAllCriticalSubresources(bool errorOccurred); |
| bool sheetLoaded(); |
| |
| void setDisabledState(bool); |
| void setSheetTitle(const String&); |
| |
| bool styleSheetIsLoading() const; |
| bool hasSheet() const { return m_sheet; } |
| bool isDisabled() const { return m_disabledState == Disabled; } |
| bool isEnabledViaScript() const { return m_disabledState == EnabledViaScript; } |
| bool isUnset() const { return m_disabledState == Unset; } |
| |
| CSSStyleSheet* sheet() const { return m_sheet.get(); } |
| |
| private: |
| // From ResourceClient |
| virtual void setCSSStyleSheet(const String& href, const KURL& baseURL, const String& charset, const CSSStyleSheetResource*); |
| |
| enum DisabledState { |
| Unset, |
| EnabledViaScript, |
| Disabled |
| }; |
| |
| enum PendingSheetType { |
| None, |
| NonBlocking, |
| Blocking |
| }; |
| |
| enum RemovePendingSheetNotificationType { |
| RemovePendingSheetNotifyImmediately, |
| RemovePendingSheetNotifyLater |
| }; |
| |
| void clearSheet(); |
| void addPendingSheet(PendingSheetType); |
| void removePendingSheet(RemovePendingSheetNotificationType = RemovePendingSheetNotifyImmediately); |
| Document& document(); |
| |
| ResourcePtr<CSSStyleSheetResource> m_resource; |
| RefPtr<CSSStyleSheet> m_sheet; |
| DisabledState m_disabledState; |
| PendingSheetType m_pendingSheetType; |
| bool m_loading; |
| bool m_firedLoad; |
| bool m_loadedSheet; |
| }; |
| |
| |
| class HTMLLinkElement FINAL : public HTMLElement, public LinkLoaderClient { |
| public: |
| static PassRefPtr<HTMLLinkElement> create(const QualifiedName&, Document&, bool createdByParser); |
| virtual ~HTMLLinkElement(); |
| |
| KURL href() const; |
| String rel() const; |
| String media() const { return m_media; } |
| String typeValue() const { return m_type; } |
| const LinkRelAttribute& relAttribute() const { return m_relAttribute; } |
| |
| virtual String target() const; |
| |
| String type() const; |
| |
| IconType iconType() const; |
| |
| // the icon size string as parsed from the HTML attribute |
| String iconSizes() const; |
| |
| CSSStyleSheet* sheet() const { return linkStyle() ? linkStyle()->sheet() : 0; } |
| Document* import() const; |
| |
| bool styleSheetIsLoading() const; |
| |
| bool isDisabled() const { return linkStyle() && linkStyle()->isDisabled(); } |
| bool isEnabledViaScript() const { return linkStyle() && linkStyle()->isEnabledViaScript(); } |
| void setSizes(const String&); |
| DOMSettableTokenList* sizes() const; |
| |
| void dispatchPendingEvent(LinkEventSender*); |
| void scheduleEvent(); |
| static void dispatchPendingLoadEvents(); |
| |
| // From LinkLoaderClient |
| virtual bool shouldLoadLink() OVERRIDE; |
| |
| // For LinkStyle |
| bool loadLink(const String& type, const KURL& url) { return m_linkLoader.loadLink(m_relAttribute, type, url, document()); } |
| bool isAlternate() const { return linkStyle()->isUnset() && m_relAttribute.isAlternate(); } |
| bool shouldProcessStyle() { return linkResourceToProcess() && linkStyle(); } |
| |
| private: |
| virtual void parseAttribute(const QualifiedName&, const AtomicString&) OVERRIDE; |
| |
| LinkStyle* linkStyle() const; |
| LinkImport* linkImport() const; |
| LinkResource* linkResourceToProcess(); |
| |
| void process(); |
| static void processCallback(Node*); |
| |
| // From Node and subclassses |
| virtual InsertionNotificationRequest insertedInto(ContainerNode*) OVERRIDE; |
| virtual void removedFrom(ContainerNode*) OVERRIDE; |
| virtual bool isURLAttribute(const Attribute&) const OVERRIDE; |
| virtual bool sheetLoaded() OVERRIDE; |
| virtual void notifyLoadedSheetAndAllCriticalSubresources(bool errorOccurred) OVERRIDE; |
| virtual void startLoadingDynamicSheet() OVERRIDE; |
| virtual void addSubresourceAttributeURLs(ListHashSet<KURL>&) const OVERRIDE; |
| virtual void finishParsingChildren(); |
| |
| // From LinkLoaderClient |
| virtual void linkLoaded() OVERRIDE; |
| virtual void linkLoadingErrored() OVERRIDE; |
| virtual void didStartLinkPrerender() OVERRIDE; |
| virtual void didStopLinkPrerender() OVERRIDE; |
| virtual void didSendLoadForLinkPrerender() OVERRIDE; |
| virtual void didSendDOMContentLoadedForLinkPrerender() OVERRIDE; |
| |
| private: |
| HTMLLinkElement(const QualifiedName&, Document&, bool createdByParser); |
| |
| RefPtr<LinkResource> m_link; |
| LinkLoader m_linkLoader; |
| |
| String m_type; |
| String m_media; |
| RefPtr<DOMSettableTokenList> m_sizes; |
| LinkRelAttribute m_relAttribute; |
| |
| bool m_createdByParser; |
| bool m_isInShadowTree; |
| int m_beforeLoadRecurseCount; |
| }; |
| |
| inline HTMLLinkElement* toHTMLLinkElement(Node* node) |
| { |
| ASSERT_WITH_SECURITY_IMPLICATION(!node || node->hasTagName(HTMLNames::linkTag)); |
| return static_cast<HTMLLinkElement*>(node); |
| } |
| |
| } //namespace |
| |
| #endif |